Inventor
CHU ALFREDO SAM
US26 patents
Patents
26 patentsUS9595288B1Mar 14, 2017
Laser mode hopping detection in a heat-assisted magnetic recording drive
SEAGATE TECHNOLOGY LLC33 citations93
US9508369B2Nov 29, 2016
Defining a maximum sequential write duration for a data storage device utilizing heat-assisted recording
SEAGATE TECHNOLOGY LLC20 citations92
US9704519B1Jul 11, 2017
Sorting of HAMR read/write heads based on reader and writer widths
SEAGATE TECHNOLOGY LLC7 citations84
US9653121B1May 16, 2017
Heat-assisted magnetic recording device capable of detecting head malfunction based on different currents of sensors
SEAGATE TECHNOLOGY LLC10 citations84
US10657987B1May 19, 2020
Laser boost and duration optimization
SEAGATE TECHNOLOGY LLC5 citations83
US9589587B1Mar 7, 2017
Laser adjustment during field operation of a heat-assisted magnetic recording data storage device
SEAGATE TECHNOLOGY LLC6 citations83
US9311951B1Apr 12, 2016
Laser adjustment during field operation of a heat-assisted magnetic recording data storage device
SEAGATE TECHNOLOGY LLC10 citations83
US9892752B1Feb 13, 2018
Selecting a maximum laser power for a calibration based on a previously measured function
SEAGATE TECHNOLOGY LLC7 citations82
US9093091B1Jul 28, 2015
Determination of reader to writer crosstrack offset via a magnetic disk
SEAGATE TECHNOLOGY LLC9 citations82
US9142244B2Sep 22, 2015
Near-field transducer efficiency monitoring system
SEAGATE TECHNOLOGY LLC5 citations81
US9842619B1Dec 12, 2017
Selecting laser power based on writing to a set of consecutive user data wedges
SEAGATE TECHNOLOGY LLC6 citations73
US9679597B1Jun 13, 2017
Bidirectional shingled magnetic recording in a heat-assisted magnetic recording device
SEAGATE TECHNOLOGY LLC4 citations73
US9548068B1Jan 17, 2017
Determining optical degradation in a heat-assisted read/write head
SEAGATE TECHNOLOGY LLC6 citations73
US9361920B1Jun 7, 2016
Compensation for track misalignment due to degradation of HAMR write head
SEAGATE TECHNOLOGY LLC4 citations73
US9349415B1May 24, 2016
Qualifying a recording head based on symmetry of a cross-track profile
SEAGATE TECHNOLOGY LLC3 citations73
US10152997B1Dec 11, 2018
Laser current calibration using preamplifier
SEAGATE TECHNOLOGY LLC3 citations72
US10147453B1Dec 4, 2018
Laser boost and duration optimization
SEAGATE TECHNOLOGY LLC2 citations72
US9916850B1Mar 13, 2018
Laser bias current control
SEAGATE TECHNOLOGY LLC4 citations72
US9202506B1Dec 1, 2015
Current boost profile applied to laser during heat-assisted magnetic recording
SEAGATE TECHNOLOGY LLC5 citations72
US10127930B1Nov 13, 2018
In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation
SEAGATE TECHNOLOGY LLC4 citations71
US9478248B2Oct 25, 2016
Adaptive HAMR laser power data storage device
SEAGATE TECHNOLOGY LLC5 citations70
US10395673B1Aug 27, 2019
In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation
SEAGATE TECHNOLOGY LLC1 citations60
US10083716B1Sep 25, 2018
Laser calibration for heat-assisted magnetic recording head using interleaved laser current
SEAGATE TECHNOLOGY LLC0 citations51
US9997176B1Jun 12, 2018
Activating a magnetic writer to recover from read errors due to reader instability
SEAGATE TECHNOLOGY LLC0 citations51
US9978403B1May 22, 2018
Changing write coil current in response to reader instability
SEAGATE TECHNOLOGY LLC0 citations51
US9734862B1Aug 15, 2017
Method and apparatus for writing test tracks on a magnetic recording medium
SEAGATE TECHNOLOGY LLC0 citations51